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ACS712 - Allegro Microsystems
ACS712 - Allegro Microsystems

... Linearity (ELIN). The degree to which the voltage output from the IC varies in direct proportion to the primary current through its full-scale amplitude. Nonlinearity in the output can be attributed to the saturation of the flux concentrator approaching the full-scale current. The following equation ...
ACS712: Fully Integrated, Hall Effect
ACS712: Fully Integrated, Hall Effect

... The Allegro™ ACS712 provides economical and precise solutions for AC or DC current sensing in industrial, commercial, and communications systems. The device package allows for easy implementation by the customer. Typical applications include motor control, load detection and management, switchmode p ...
TPS2412, TPS2413 N+1 and ORing Power Rail Controller (Rev. C)
TPS2412, TPS2413 N+1 and ORing Power Rail Controller (Rev. C)

... MOSFET gate threshold voltage. If the external circuits force V(AC) below 10 mV and above the programmed fast turnoff, GATE is slowly turned off. GATE is rapidly pulled to ground if V(AC) falls to the RSET programmed fast turnoff threshold. The TPS2413 turns the MOSFET on and off like a comparator w ...
ACS712: Fully Integrated, Hall Effect
ACS712: Fully Integrated, Hall Effect

... The Allegro™ ACS712 provides economical and precise solutions for AC or DC current sensing in industrial, commercial, and communications systems. The device package allows for easy implementation by the customer. Typical applications include motor control, load detection and management, switchmode p ...
Section 4. Inspection Of Circuit
Section 4. Inspection Of Circuit

... more, generally have silver contacts. In general, silver contacts should not be used to control devices which have either a voltage less than 8 volts or a continuous current less than 0.5 amps unless the switch is specifically rated for use with low-energy loads. Table 11-5 provides general guidelin ...
bh1415 - Electronics DIY
bh1415 - Electronics DIY

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A Fully-Integrated Reconfigurable Dual
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1N5820 - Instructables
1N5820 - Instructables

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Sensorless Start-up and Control of Permanent Magnet Synchronous
Sensorless Start-up and Control of Permanent Magnet Synchronous

... of subsea pump motors with long tieback distance and high breakaway torque becomes more and more relevant. Lack of sufficient expertise and right tools for analyses and calculations can easily lead to over dimensioned components; along with its unwanted consequences on component size, weight and cos ...
Pdf - Text of NPTEL IIT Video Lectures
Pdf - Text of NPTEL IIT Video Lectures

... the inter polar region 0 the other will be at 2 pi by p, but the number of coils connected in series between these two brushes will be 2 pi by a, where a is the number of parallel paths. So, 2 pi by a e c d theta, e c which is equal to 2 omega n z by 4 pi integral 0 to 2 pi by a B r l d theta. Now, ...
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KLS`s Gogte Institute of Technology, Udyambag, Belagavi Course
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Remote AC Power Controller Owner`s Manual
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... multiple PowerPorts with one or more remote switches, connect the REM IN, +12V and GND terminals of all units together. Be sure that the mode (momentary or maintained) of all units is set the same. Connect a single maintained switch or one or more momentary switches to the PowerPort nearest the swit ...
New Breed of Network Fault-Tolerant Voltage-Source
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... per converter with the proposed HVDC system is one quarter of those required for a system based on the modular multilevel converter. With a large number of cells per phase, the voltage waveform generated across the H-bridge cells is as shown in Fig. 1, and an effective switching frequency per device ...
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... current becomes difficult. Not only does this measurement require a picoammeter, but test socket leakages can easily exceed the actual device bias currents. To accurately measure these small currents, Texas Instruments uses a two-step process. The socket leakage is measured using picoammeters with b ...
Linear Systems replaces discontinued Siliconix 2N4391
Linear Systems replaces discontinued Siliconix 2N4391

... Information furnished by Linear Integrated Systems and Micross Components is believed to be accurate and reliable. However, no responsibility is assumed for its use; nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implicati ...
2330 Level 2 Electrotechnical Technology
2330 Level 2 Electrotechnical Technology

... device and is used to supply a 230 V 3 kW water heater. If the cable has a rated voltage drop of 29 mV/A/m and the circuit is 24 m long, the actual voltage drop will be a ...
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... Considerations on Permissible Dissipation and Heat Generation Since this IC functions with high efficiency without significant heat generation in most applications, no special consideration is needed on permissible dissipation or heat generation. In case of extreme conditions, however, including low ...
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Aalborg Universitet Single-Phase Microgrid with Seamless Transition Capabilities between Modes of Operation

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Rotor side control of grid-connected wound rotor induction machine

... Presently, increased attention is being paid to rotor side control of wound rotor induction machine for VSCF wind power generation. Voltage source inverters using IGBTs have become the de facto choice for variable speed drives in the 90s. The diode bridge and thyristor inverter combination in the st ...
DMS-20LCD Series - Murata Power Solutions
DMS-20LCD Series - Murata Power Solutions

... must be fully tested by the user, using a combination of low supply voltages and the input signal’s minimum and maximum levels, to ensure that all display readings are valid as long as the LOW BAT annunciator remains off. 6. Gain Adjust: There is a gain-adjust potentiometer on the back of each meter ...
The Impact of Power Switching Devices on the Thermal
The Impact of Power Switching Devices on the Thermal

... According to [6,9–12], the thermal cycling behavior inside the power switching devices is one of the key failure mechanisms and is closely related to its life time as well as the cost/size of the corresponding heat sink system. Therefore, it is interesting to investigate the thermal cycling related ...
emtron dx-4 - RADIOMANUAL
emtron dx-4 - RADIOMANUAL

... two computer type fans sucking air and positioned above the tubes. All fans operate at two speeds, controlled by 2 temperature sensors. Tetrodes offer exceptionally stable operation and levels of quality performance far exceeding that which can be expected from triodes. The harmonic output and inter ...
4.  SIGNAL PROCESSING CIRCUITRY 4.1.  INTRODUCTION
4. SIGNAL PROCESSING CIRCUITRY 4.1. INTRODUCTION

... The successful extraction of the information superimposed on the Hall voltage requires for the correct analog signal processing circuits to be developed. The objective of analog circuit design is to transform the specifications into hardware capable of attaining these specifications. As integrated c ...
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Variable-frequency drive



A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.VFDs are used in applications ranging from small appliances to the largest of mine mill drives and compressors. However, around 25% of the world's electrical energy is consumed by electric motors in industrial applications, which are especially conducive for energy savings using VFDs in centrifugal load service, and VFDs' global market penetration for all applications is still relatively small. That lack of penetration highlights significant energy efficiency improvement opportunities for retrofitted and new VFD installations.Over the last four decades, power electronics technology has reduced VFD cost and size and has improved performance through advances in semiconductor switching devices, drive topologies, simulation and control techniques, and control hardware and software.VFDs are available in a number of different low- and medium-voltage AC-AC and DC-AC topologies.
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